Heat sealing and cold cutting device of bag making machine

Abstract

The utility model discloses a heat-sealing and cold-cutting device of a bag making machine. The heat-sealing and cold-cutting device comprises a workbench and a rack, the pressing mounting seat is arranged on the rack; the heat sealing cutter is mounted at the bottom of the pressing mounting seat; the air blowing assemblies are arranged on the downward pressing mounting base, located on the two sides of the heat sealing cutter and used for blowing off the plastic film from the heat sealing cutter; the two sets of flattening assemblies are located on the two sides of the bottom of the downward-pressing installation base respectively and used for flattening the wrinkled plastic film, the downward-pressing installation base is started to drive the heat sealing cutter, the air blowing assembly and the flattening assemblies to descend, firstly, the flattening assemblies descend to make contact with the plastic film to flatten the plastic film, and then the plastic film is flattened. The heat sealing cutter descends to conduct heat sealing operation on the plastic film, when the temperature of the heat sealing cutter is too high and the cutter sticking phenomenon occurs, the blowing assembly is started to automatically blow off the plastic film from the heat sealing cutter, the stuck plastic film does not need to be scraped off manually, normal use of the device is prevented from being affected, and the production efficiency of the plastic film bag is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of bag making machine technology, specifically to a heat sealing and cold cutting device for a bag making machine. Background Technology

[0002] Plastic packaging bags are packaging bags made from plastic as raw material, used in the production of various daily necessities, and widely used in daily life and industrial production. Existing bag-making machines generally use heat-sealing and cold-cutting devices to heat-seal and cold-cut the film to obtain the finished packaging bags.

[0003] However, during the heat sealing and cold cutting operation of plastic film, the heat sealing knife often sticks to the knife due to its high temperature. The sticky plastic film needs to be scraped off manually, which affects the normal use of the device and reduces the production efficiency of plastic film bags. Therefore, a heat sealing and cold cutting device for bag making machine is provided. Utility Model Content

[0004] The purpose of this utility model is to provide a heat-sealing and cold-cutting device for a bag making machine, so as to solve the problem that the heat-sealing knife often sticks to the knife due to excessively high temperature, requiring manual scraping off of the sticky plastic film, which affects the normal use of the device and leads to a decrease in the production efficiency of plastic film bags.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat-sealing and cold-cutting device for a bag-making machine, comprising:

[0006] Workbench;

[0007] The frame is mounted on the workbench.

[0008] A pressure mounting base is provided on the aforementioned frame;

[0009] A heat sealing knife is installed at the bottom of the pressing mounting base;

[0010] A blower assembly is mounted on the pressure mounting base and located on both sides of the heat sealing knife, used to blow the plastic film off the heat sealing knife;

[0011] The flattening assembly is provided in two sets, located on both sides of the bottom of the pressing mounting base, for flattening the wrinkled plastic film.

[0012] Preferably, the blowing assembly includes an annular air cavity disposed at the bottom of the pressure mounting base, a fan is provided on the frame, a spiral air pipe is provided between the fan and the annular air cavity, and exhaust channels are provided at the bottom of the annular air cavity and on both sides of the heat sealing knife.

[0013] Preferably, the opening end of the exhaust duct is wider at the top and narrower at the bottom, and the air outlet end of the exhaust duct faces the bottom of the heat sealing knife.

[0014] Preferably, the flattening assembly includes two connecting rods rotatably mounted at the front and rear ends of the side wall of the pressing mounting base, a flattening roller is provided between the ends of the two connecting rods, and a spring piece is provided between the side wall of the pressing mounting base and the connecting rods.

[0015] Preferably, the pressing mounting base includes an electric cylinder mounted on the frame, the output end of the electric cylinder passing through the frame and having a pressing base, the pressing base having a guide rod passing through the frame, and the heat sealing knife mounted on the bottom of the pressing base.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a heat-sealing and cold-cutting device for a bag-making machine. When performing heat-sealing and cold-cutting operations on plastic film, the lowering mounting base is first activated to drive the heat-sealing knife, the blowing assembly, and the flattening assembly to descend. First, the flattening assembly descends and contacts the plastic film to flatten it. Then, the heat-sealing knife descends to perform a heat-sealing operation on the plastic film. When the heat-sealing knife temperature is too high and sticking occurs, the blowing assembly is activated to automatically blow the plastic film off the heat-sealing knife. There is no need for manual scraping off the sticky plastic film, which avoids affecting the normal use of the device and ensures the production efficiency of plastic film bags. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0019] Figure 3 for Figure 1 A magnified schematic diagram of the structure at point A;

[0020] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point B.

[0021] In the diagram: 1. Workbench; 2. Frame; 3. Pressing mounting base; 3-1. Electric cylinder; 3-2. Pressing base; 3-3. Guide rod; 4. Heat sealing knife; 5. Blowing assembly; 5-1. Annular air cavity; 5-2. Fan; 5-3. Spiral air pipe; 5-4. Exhaust duct; 6. Flattening assembly; 6-1. Connecting rod; 6-2. Flattening roller; 6-3. Spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a heat-sealing and cold-cutting device for a bag-making machine, comprising: a workbench 1; a frame 2 disposed on the workbench 1; a pressing mounting base 3 disposed on the frame 2; a heat-sealing knife 4 mounted on the bottom of the pressing mounting base 3; a blowing assembly 5 disposed on the pressing mounting base 3 and located on both sides of the heat-sealing knife 4, used to blow plastic film off the heat-sealing knife 4; and two sets of flattening assemblies 6 disposed on the bottom sides of the pressing mounting base 3, used to flatten the wrinkled plastic film. During the heat sealing and cold cutting operation, the lowering mounting base 3 is first activated to drive the heat sealing knife 4, the blowing assembly 5, and the flattening assembly 6 to descend. First, the flattening assembly 6 descends and contacts the plastic film to flatten it. Then, the heat sealing knife 4 descends to perform the heat sealing operation on the plastic film. When the heat sealing knife 4 becomes too hot and sticks to the knife, the blowing assembly 5 is activated to automatically blow the plastic film off the heat sealing knife 4. There is no need to manually scrape off the sticky plastic film, which avoids affecting the normal use of the device and ensures the production efficiency of plastic film bags.

[0024] Specifically, the blowing assembly 5 includes an annular air cavity 5-1 located at the bottom of the pressure mounting base 3, a fan 5-2 mounted on the frame 2, and a spiral air pipe 5-3 between the fan 5-2 and the annular air cavity 5-1. By setting the spiral air pipe 5-3, the spiral air pipe 5-3 can be extended and retracted during the up and down movement of the pressure mounting base 3. The bottom of the annular air cavity 5-1 and both sides of the heat sealing knife 4 are provided with exhaust channels 5-4. In use, by starting the fan 5-2, the external air enters the annular air cavity 5-1 through the spiral air pipe 5-3 and is blown out from the two exhaust channels 5-4, thereby blowing the plastic film off the heat sealing knife 4.

[0025] Specifically, the opening of the exhaust duct 5-4 is wider at the top and narrower at the bottom. This design allows the air to be accelerated within the exhaust duct 5-4 when it is discharged, forming a high-speed airflow. This increases the force of the airflow as it is discharged from the outlet of the exhaust duct 5-4, creating a greater thrust on the plastic film. This improves the efficiency of the blower assembly 5 in blowing the plastic film off the heat-sealing knife 4. The outlet of the exhaust duct 5-4 faces the bottom of the heat-sealing knife 4, ensuring precise airflow to the contact point between the plastic film and the heat-sealing knife 4.

[0026] Specifically, the flattening assembly 6 includes two connecting rods 6-1 rotatably mounted at the front and rear ends of the side wall of the pressing mounting base 3. The height of the ends of the connecting rods 6-1 is lower than the height of the heat sealing knife 4. A flattening roller 6-2 is provided between the ends of the two connecting rods 6-1. A spring piece 6-3 is provided between the side wall of the pressing mounting base 3 and the connecting rods 6-1. When the pressing mounting base 3 drives the flattening assembly 6 to descend, the flattening roller 6-2 first contacts the plastic film. As the pressing mounting base 3 descends, the two flattening rollers 6-2 move away from each other on the worktable 1, so that the flattening roller 6-2 rolls on the plastic film to flatten the wrinkled plastic film. During the process of the two flattening rollers 6-2 moving away from each other, the connecting rods 6-1 rotate relative to each other. At this time, the spring piece 6-3 is in a compressed state. The pressure of the spring piece 6-3 limits the plastic film, so that the flattening assembly 6 flattens and limits the wrinkled plastic film.

[0027] Specifically, the pressing mounting base 3 includes an electric cylinder 3-1 mounted on the frame 2. The output end of the electric cylinder 3-1 passes through the frame 2 and is provided with a pressing base 3-2. The pressing base 3-2 is provided with a guide rod 3-3 passing through the frame 2. At least two guide rods 3-3 are provided, located on both sides of the electric cylinder 3-1 respectively. The guide rods 3-3 ensure the stability of the pressing base 3-2 during its up-and-down movement. The heat sealing knife 4 is mounted on the bottom of the pressing base 3-2. In use, the pressing base 3-2 is pressed down by starting the electric cylinder 3-1. This realizes the heat sealing knife 4, the blowing assembly 5 and the flattening assembly 6 being lowered by starting the pressing mounting base 3 to perform heat pressing operation on the plastic film.

[0028] Working principle: When this utility model is working, the pressing mounting base 3 is first activated to drive the heat sealing knife 4, the blowing assembly 5 and the flattening assembly 6 to descend. During the descent of the pressing mounting base 3, the flattening assembly 6 descends first to contact the plastic film and flatten it. The heat sealing knife 4 descends to perform a heat sealing operation on the plastic film. The blowing assembly 5 is activated to automatically blow the plastic film off the heat sealing knife 4, thus ensuring the production efficiency of the plastic film bags.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-sealing and cold-cutting device for a bag-making machine, characterized in that, include: Workbench (1); The frame (2) is set on the workbench (1); A pressure mounting base (3) is mounted on the frame (2); A heat sealing knife (4) is installed at the bottom of the pressing mounting base (3); The blower assembly (5) is disposed on the pressing mounting base (3) and located on both sides of the heat sealing knife (4) for blowing the plastic film off the heat sealing knife (4); The flattening assembly (6) is provided in two sets, located on the bottom sides of the pressing mounting base (3), respectively, for flattening the wrinkled plastic film.

2. The heat-sealing and cold-cutting device for a bag-making machine according to claim 1, characterized in that: The blower assembly (5) includes an annular air cavity (5-1) located at the bottom of the pressure mounting base (3), a fan (5-2) is provided on the frame (2), a spiral air pipe (5-3) is provided between the fan (5-2) and the annular air cavity (5-1), and exhaust channels (5-4) are provided at the bottom of the annular air cavity (5-1) and on both sides of the heat sealing knife (4).

3. The heat-sealing and cold-cutting device for a bag-making machine according to claim 2, characterized in that: The opening of the exhaust channel (5-4) is wider at the top and narrower at the bottom, and the air outlet of the exhaust channel (5-4) faces the bottom of the heat sealing knife (4).

4. The heat-sealing and cold-cutting device for a bag-making machine according to claim 1, characterized in that: The flattening assembly (6) includes two connecting rods (6-1) that are rotatably mounted on the front and rear ends of the side wall of the pressure mounting base (3). A flattening roller (6-2) is provided between the ends of the two connecting rods (6-1). A spring piece (6-3) is provided between the side wall of the pressure mounting base (3) and the connecting rods (6-1).

5. The heat-sealing and cold-cutting device for a bag-making machine according to claim 1, characterized in that: The pressure mounting base (3) includes an electric cylinder (3-1) mounted on the frame (2). The output end of the electric cylinder (3-1) passes through the frame (2) and is provided with a pressure base (3-2). The pressure base (3-2) is provided with a guide rod (3-3) that passes through the frame (2). The heat sealing knife (4) is mounted on the bottom of the pressure base (3-2).

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